|
%I M2614 N1034 #28 Dec 20 2022 09:18:18
%S 0,1,3,7,8,14,29,31,42,52,66,85,99,143,161,185,190,267,273,304,330,
%T 371,437,476,484,525,603,612,658,806,913,1015,1074,1197,1261,1340,
%U 1394,1463,1477,1548,1606,1680,1771,1912,2009,2075,2159,2262,2439,2698,2717
%N Numbers of the form (p^2 - 1)/120 where p is 1 or prime.
%C For n>1, primes p corresponding to a(n) are in A038872(n) = A045468(n-1) = A141158(n). - _Ray Chandler_, Jul 29 2019
%D H. Gupta, On a conjecture of Chowla, Proc. Indian Acad. Sci., 5A (1937), 381-384.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H Ray Chandler, <a href="/A002381/b002381.txt">Table of n, a(n) for n = 1..10000</a>
%H H. Gupta, <a href="/A002381/a002381.pdf">On a conjecture of Chowla</a>, Proc. Indian Acad. Sci., 5A (1937), 381-384. [Annotated scanned copy]
%t Join[{0},Select[Table[(p^2-1)/120,{p,Prime[Range[200]]}],IntegerQ]] (* _Harvey P. Dale_, Jan 14 2020 *)
%o (PARI) j=[]; for(n=0,150,x=prime(n)^2-1; if(Mod(x,120)==0,j=concat(j,(x/120)))); j
%Y Cf. A002382, A002855, A038872, A045468, A141158, subsequence of A093722.
%K nonn
%O 1,3
%A _N. J. A. Sloane_
%E More terms from _Jason Earls_, Jul 29 2001
|
